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Archaeocursor (meaning "old runner") is an extinct genus of basal ornithischian dinosaurs from the Early Jurassic Ziliujing Formation of China. The genus contains a single species, A. asiaticus, known from a single femur. Archaeocursor represents the oldest and most basal ornithischian described from Asia.
Archaeocursor (meaning "old runner") is an extinct genus of basal ornithischian dinosaurs from the Early Jurassic Ziliujing Formation of China. The genus contains a single species, A. asiaticus, known from a single femur. Archaeocursor represents the oldest and most basal ornithischian described from Asia.
== Discovery and naming == thumb|left|Map and photograph of the Archaeocursor type locality The Archaeocursor holotype specimen, L01-HY999, was discovered in 2022 in outcrops of the Ziliujing Formation (Dongyuemiao Member) near Chongqing Central Park in Yubei District of Chongqing Municipality, China. The collection of this bone was part of an operation by the Southeast Sichuan Geological Team to salvage paleontological materials during construction in a residential area, and it is now accessioned in the Chongqing Municipal Bureau of Planning and Natural Resources. The specimen consists of an isolated nearly complete left femur.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).